Which bacteria is known to cause pustules, rashes, and boils?

Staphylococcus bacteria are well-known for their association with a variety of skin infections, including the formation of pustules, rashes, and boils. These bacteria are commonly found on the skin and in the nasal passages of healthy individuals. When they penetrate the skin through cuts or other openings, they can cause localized infections that lead to the development of pus-filled lesions (pustules) as the immune response attempts to contain the infection.

The presence of boils, which are painful, swollen lumps filled with pus, is particularly characteristic of Staphylococcus infections. This bacterium, especially Staphylococcus aureus, is also frequently implicated in more serious infections that can occur if the bacteria enter the bloodstream or cause deeper tissue infections.

Other bacteria mentioned, such as Escherichia coli, Streptococcus, and Salmonella, primarily cause different types of infections. While Streptococcus can also lead to skin conditions, it typically does not cause the characteristic pustules and boils as frequently as Staphylococcus. Therefore, the association of Staphylococcus with such skin-related symptoms makes it the correct choice.